If a woman has recurrent fever during pregnancy, it is usually considered to be caused by a bacterial infection. A blood culture test should be done to see if there is any specific pathogenic bacteria growing, and the exact location of the infection should also be determined based on the accompanying symptoms of the pregnant woman. If there is a cough, sore throat or coughing up blood along with recurrent fever, it should be considered that it may be caused by bronchial inflammation or lung infection. Therefore, a sputum culture test and, if necessary, a lung X-ray may be required. If a pregnant woman has persistent pain in the lower abdomen and even obvious yellow discharge from the vagina when she has a fever, it is important to consider that it may be caused by pregnancy combined with pelvic inflammatory disease. This can affect the normal growth and development of the fetus and even lead to fetal malformations, so anti-inflammatory treatment with intravenous antibiotics is needed after the diagnosis.